/usr/include/simgear/sound/sample_queue.hxx is in libsimgear-dev 3.4.0-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/// Provides a sample queue encapsulation
//
// based on sample.hxx
//
// Copyright (C) 2010 Erik Hofman <erik@ehofman.com>
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
#ifndef _SG_QUEUE_HXX
#define _SG_QUEUE_HXX 1
#include <string>
#include <vector>
#include <simgear/compiler.h>
#include <simgear/structure/SGReferenced.hxx>
#include <simgear/structure/SGSharedPtr.hxx>
#include "sample_openal.hxx"
/**
* manages everything we need to know for an individual audio sample
*/
class SGSampleQueue : public SGSoundSample {
public:
/**
* Empty constructor, can be used to read data to the systems
* memory and not to the driver.
* @param freq sample frequentie of the samples
* @param format OpenAL format id of the data
*/
SGSampleQueue(int freq, int format = AL_FORMAT_MONO8);
/**
* Destructor
*/
~SGSampleQueue ();
/**
* Schedule this audio sample to stop playing.
*/
virtual void stop();
/**
* Queue new data for this audio sample.
*
* @param data Pointer to a memory block containg this audio sample data.
* @param len Length of the sample buffer in bytes.
*/
void add( const void* data, size_t len );
/**
* Set the source id of this source.
*
* @param sid OpenAL source-id
*/
virtual void set_source(unsigned int sid);
/**
* Test if the buffer-id of this audio sample may be passed to OpenAL.
*
* @return false for sample queue
*/
inline bool is_valid_buffer() const { return false; }
inline virtual bool is_queue() const { return true; }
private:
std::string _refname; // sample name
std::vector<unsigned int> _buffers;
bool _playing;
std::string random_string();
};
#endif // _SG_QUEUE_HXX
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